<template>
    <div class="login_container">
        <div class="login_box">
            <div class="avatar_box">
                <img src="../assets/logo.png" alt="">
            </div>
            <!-- 登录表单区域 -->
            <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
            <!-- 用户名 -->
                <el-form-item prop="username">
                    <el-input v-model="loginForm.username"  prefix-icon="iconfont icon-user"></el-input>
                </el-form-item>
                <!-- 密码 -->
                <el-form-item prop="password">
                    <el-input v-model="loginForm.password"  prefix-icon="iconfont icon-3702mima" show-password></el-input>
                </el-form-item>
                <!-- 按钮区域 -->
                <el-form-item class="btns">
                    <el-button type="primary" @click="login">登录</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>

<script>
export default {
    data() {
        return {
            // 登录表单的数据绑定对象
            loginForm:{
                username: 'admin',
                password: '123456'
            },
            // 表单的验证规则对象
            loginFormRules: {
                // 验证用户名是否合法
                username:[
                    { required: true, message: '请输入登录名称', trigger: 'blur' },
                    { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                ],
                // 验证密码是否合法
                password:[
                    { required: true, message: '请输入登录密码', trigger: 'blur' },
                    { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
                ]
            }
        }
    },
    methods: {
        resetLoginForm() {
            // console.log(this);
            this.$refs.loginFormRef.resetFields()
        },
        login(){
            this.$refs.loginFormRef.validate(async valid => {
                if (!valid) return
                const {data: res} = await this.$http.post('login',this.loginForm)
                if (res.meta.status !== 200) return this.$message.error('登录失败')
                this.$message.success('登录成功')
                // 将登录成功之后的 token ，保存到浏览器的 sessionStorage 中
                window.sessionStorage.setItem('token',res.data.token)
                // 通过编程式导航跳转到后台主页，路由地址是 /home
                this.$router.push('/home')
            })
        }
    }
}
</script>

<style lang="less" scoped>
 .login_container {
     background-color: #2b4b6b;
     height: 100%;
 }
 .login_box {
     width: 450px;
     height: 300px;
     background-color: #fff;
     border-radius: 3px;
     position: absolute;
     top: 50%;
     left: 50%;
     transform: translate(-50%,-50%);

     .avatar_box {
         width: 130px;
         height: 130px;
         border: 1px solid #eee;
         border-radius: 50%;
         padding: 10px;
         box-shadow: 0 0 10px #ddd;
         position: absolute;
         left: 50%;
         transform: translate(-50%,-50%);
         background-color: #fff;
         img {
             width: 100%;
             height: 100%;
             border-radius: 50%;
             background-color: #eee;
         }
     }
 }
 .login_form {
     position: absolute;
     bottom: 0;
     width: 100%;
     padding: 0 20px;
     box-sizing: border-box;
 }
 .btns {
     display: flex;
     justify-content: flex-end;
 }
</style>